Cylinder-mill for granulatidtg corn



l. WILSON.-

Mill. for Cracking Corn, &c.

Patented July 23, 1841.

/A/ VE/V rah WW UNITED STATES PATENT OFFICE.

CYLINDER-MILL FOR GRANULATING CORN, POWDER, BARK, AND OTHER SUBSTANCES.

Specification of Letters Patent No. 2,192, dated July 23, 1841.

To all whom it may concern:

Be it known that I, INCREASE VILSON, of New London, in the county of NewLondon and State of Connecticut, have invented a new and usefulImprovement in Mills for Granulating Corn, Powder, Bark, and otherSubstances, and that the following is a full and exact description.

1 construct a frame, the top of which may be cast iron, of a proper sizeto sustain two cylinders, and other parts which will be describedhereafter. The cylinders may vary in length or diameter, according tothe power by which they are to be operated; and are made of wroughtiron, with teeth or cutters, formed on the outside (which may be fine orcoarse, according as the substance to be granulated may he wanted). Eachcylinder has a bearing one inch in diameter outside of which, on one endof each, is suflicient space to secure on a spur wheel. Those cylindersmay be eight inches long, between the bearings; the diameter of one,three inches, and of the other two inches, after being turned true.

The teeth or cutters, are formed by cutting spaces straight or angularlengthwise of the cylinders, one quarter of an inch wide, taking nothingoff of one side of the space, but cutting down on a bevel to the otherside, one eighth of an inch deep. I also cut channels directly aroundeach cylinder, from end to end, which channels are one eighth of an inchwide, and one eighth of an inch deep, leaving a space between eachchannel somewhat less than one eighth of an inch wide, so that thespaces which are left on one cylinder, may enter freely into thechannels made in the other, where they are intended to run. The teeth orcutters being thus formed, the cylinders are case-hardened, or ifpreviously plated with steel (as they may be) they only require to behardened and tempered in the common way.

Cylinders for granulating powder, may be cast of composition, say aboutfour parts of copper to one part of block tin; after which, the teethcan be formed as before named in making those of iron.

In order to explain the manner of arranging and connecting the cylinderson the frame, I will suppose the ends of the frame, to stand east andwest. The large cylinder is placed on the north side of the center andthe small one, on the south side, with the teeth of each cylinderprojected into the channels of the other, and the teeth of bothcylinders pointing south, in which direction they are intended to run.On the west end, on the large cylinder, outside the hearing, I secure aspur wheel, two and a half inches in diameter; at the east end, on thesmall cylinder outside the bearing, I se cure a spur wheel eight inchesin diameter. The shaft which has two bearings, I place on the frame, alittle north of the large cylinder in boxes on a line with the cylinderboxes. Near the west end on the shaft outside of the bearing, is secureda spurwheel, three inches in diameter, which is connected with the twoand a half inch wheel before named on the large cylinder. Near the eastend, on the shaft, outside the bearing, is secured a spur-wheel, threeinches in diameter which is connected with the eight inch wheel beforenamed on the small cylinder. On one or both ends of the shaft, a pulleyor crank is secured to which the power to operate the mill is applied. Ahopper is made to set over the cylinders, which is secured to the framewith screws. A metallic plate is secured on the inside of the hopper,eight inches long, two inches wide, one quarter of an inch thick, havingteeth formed on the lower edge, to fit into the channels of the smallcylinder, so as to prevent any substance not sufliciently granulated,from passing out bet-ween the hopper and the cylinder.

lVhat- I claim as my invention, and desire to secure by Letters Patent,is

The peculiar manner of arranging the cylinders, so as to have thecutters on each cylinder, enter and run in the scores or spaces in theother cylinder, as herein described.

INCREASE WILSON.

